65 lines
1.2 KiB
Plaintext
65 lines
1.2 KiB
Plaintext
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#!/bin/bash
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RETRIES=0
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MAXRETRIES=5
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RETRYSLEEP=4
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onexit() {
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return
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}
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checkpassword() {
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local PASS=${2//$/\\$}
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expect << EOF >/dev/null
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spawn su $1 -c "exit"
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expect "Password:"
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send "${PASS}\r"
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expect eof
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catch wait result
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exit [lindex \$result 3]
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EOF
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}
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header() {
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clear
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echo ""
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echo ""
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echo ""
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echo ""
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if [ "${RETRIES}" -ne 0 ]; then
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echo "Locked by ${USER} (${RETRIES} failed login attempts)"
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else
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echo "Locked by ${USER}"
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fi
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}
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authenticate() {
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header
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local PASSWORD=""
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local RETRY=0
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while true; do
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read -s -p "Password: " PASSWORD
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echo
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checkpassword ${USER} "${PASSWORD}"
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if [ "$?" -eq 0 ]; then
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echo "Welcome back!"
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echo ""
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exit 0
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else
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RETRIES=$((RETRIES+1))
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RETRY=$((RETRY+1))
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echo "authentication failed!"
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echo ""
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if [ "${RETRY}" -ge "${MAXRETRIES}" ]; then
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RETRY=0
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echo "sleeping for ${RETRYSLEEP}"
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sleep ${RETRYSLEEP}
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header
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fi
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fi
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done
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}
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trap onexit 1 2 3 15 18 20 ERR
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authenticate
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